一种改进的NLOS环境下的TDOA/AOA混合定位算法

段凯宇; 张力军

一种改进的NLOS环境下的TDOA/AOA混合定位算法

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出版历程
- 收稿日期: 2004-07-07
- 修回日期: 2004-11-22
- 刊出日期: 2006-02-19

An Improved Hybrid TDOA/AOA Location Algorithm in NLOS Environment

摘要

摘要: 在蜂窝移动通信系统中，利用基站测量的到达时间差(TDOA)和电波到达角(AOA)的混合定位方法能够比传统的TDOA方法提供更高的定位精度。但是在非视距(NLOS)条件下，当AOA的测量误差超过一定值时，定位的误差仍然很大。该文根据NLOS传播环境下附加传播时延服从指数分布的特性，估计附加时延的均值和方差，对TDOA测量值进行重构，再以AOA方法进行辅助定位。仿真结果表明，该算法能显著提高传统的TDOA和TDOA/AOA方法在NLOS传播环境下的定位精度。
- 到达时间差;到达角;非视距;定位
Abstract: In cellular mobile communication systems, the hybrid Time Difference Of Arrival(TDOA) and the Angle Of Arrival(AOA) location algorithm can reach higher accuracy than traditional TDOA method does. But in NLOS environment, when the measurement error of AOA surpasses a certain value, the location error is still large. This paper proposes an effective location method on the condition that the excessive time delay in NLOS environment is exponential. This method estimates the mean and variances of the excessive time delay based on its statistical property firstly and then reconstructs the TDOA for migrating the influence of the NLOS error. Then use the AOA algorithm as the assistant method. The result of simulation proves its effectiveness in improving the location accuracy than traditional TDOA and TDOA/AOA method in NLOS propagation environment.

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参考文献(1)

Chan Y T, Ho K C. A simple and efficient estimator for hyperbolic location. IEEE Trans. on Signal Processing, 1994, SP-42(8): 1905.1915.[2]邓平, 李莉, 范平志. 一种TDOA/AOA混合定位算法及其性能分析. 电波科学学报, 2002, 17(6): 633636. .[3]Cong Li, Zhuang Wei-hua. Hybrid TDOA/AOA mobile user location for wideband CDMA cellular system. IEEE Trans. on Wireless Comunications, 2002, 18(3): 439447.[4]Ma Changlin, Klukas R, Lachapelle G . An enchanced two-step least squared approach for TDOA/AOA wireless location, ICC2003, Anchorage, Alaska, USA, 2003.5, Vol.2: 987.991.[5]Wylie M P, Holtzman J. The non-line-of-sight problem in mobile location estimation[A]. IEEE International Conference on Universal Personal Communication, Cambridge, Massachusetts, USA, 1996: 827.831.[6]Chen Pi-chun. A non-line-of-sight error mitigation algorithm[J].IEEE Wireless Communications and Networking Conference (WCNC99), New Orleans, USA.1999, 1(9):316320-[7]邓平, 刘林, 范平志. 一种基于TDOA重构的蜂窝网定位服务NLOS误差消除方法. 电波科学学报, 2003, 18(3): 311.316.[8]田孝华, 廖桂生. 一种有效减小非视距传播影响的TOA定位方法. 电子学报, 2003, 31(9): 14291432. .[9]Greenstein L J, et al.. A new path-gain/delay spread propagation model for digital cellular channel[J]. IEEE Trans. on VT, 1997,46(2): 177.484.[10]Aszetly D. On antenna arrays in mobile communication system: Fast fading and GSM base station receiver algorithms. [Ph.D. dissertation], Royal Institute Technology, Sweden, Mar. 1996.[11]Klukas R, Fattouche M. Line-of-sight angle of arrival estimation in the outdoor multipath environment. IEEE Trans. on VT, 1998, 47(1): 342.351.[12]Reed J, Rappaport T. An Overview of the challenges and progress in meeting the E-911 requirement for location Service[J]. IEEE Communication Magazine , 1998, 36(4): 3037.

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